Patent · US Expired

Gas sensor

US5880353A · kind A · utility

19Cited by

13References

14Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Theodor Graser · Stuttgart, DE
Gerhard Hoetzel · Stuttgart, DE
Johann Wehrmann · Stuttgart, DE
Heinz Eisenschmid · Stuttgart, DE

Key dates

Filing date	Dec 14, 1997
Grant date	Mar 9, 1999
Priority date	—
Expiry date	Dec 14, 2017

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/4077
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A gas sensor having a sensor element which is immobilized in gas-tight fashion in a metal housing. The gas sensor has a double-walled protective tube with an outer protective sleeve and an inner protective sleeve, each of which possesses openings for the entry and/or exit of gas. The inner protective sleeve forms a gas space into which the sensor element projects with a section at the measurement-gas end. The outer protective sleeve is a sleeve having a closed enveloping surface, the openings for the entry and/or exit of gas being arranged in the cavity at the end face of the sleeve. The gas space formed by the inner protective sleeve has, perpendicular to the extension direction of the sensor element, a rectangular cross section.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.